KR101336323B1 - Apparatus for controlling service handover of end-to-end and method using the same - Google Patents

Abstract

An apparatus for end-to-end service handover control and a method thereof are disclosed. The apparatus for service handover control of the present invention collects relevant information of a transmitting terminal, a receiving terminal and a radio access network operating on an IMS (IP Multimedia Subsystem), and based on the collected information, A service handover management unit for outputting a control signal for controlling a service handover and related information of the transmitting terminal and the receiving terminal to the service handover managing unit, and based on the control signal, And a service handover control unit for controlling service handover.

IMS, Service Handover, Handover

Description

End-to-end service handover control device and its method {APPARATUS FOR CONTROLLING SERVICE HANDOVER OF END-TO-END AND METHOD USING THE SAME}

The present invention relates to a service handover, and more particularly to an end for controlling end-to-end service handover between terminals based on relevant information of terminals operating on an IP Multimedia Subsystem (IMS). It relates to a two-end service handover control device and a method thereof.

IMS (IP Multimedia Subsystem) is a technology for providing new services in all IP-based wireless access network (Access Netowrk) environments.

In this case, the IP-based wireless access network environment may be a wireless LAN (WLAN), a wireless broadband (WiBro) / world interoperability for microwave access (WiMax), a wideband code division multiple access (WCDMA), or the like.

The terminal operating on the IMS base has various network interfaces that can be connected to various radio access networks to operate in various radio access network environments.

When a voice call or a video call is made between terminals operating on the IMS base, each terminal performs a call with a counterpart terminal through a network interface that can be connected to a wireless access network environment where the terminal is located.

When each terminal moves to another radio access network environment while performing a call, each terminal performs a seamless call through handover to another radio access network environment.

That is, the conventional handover is a handover that prevents disconnection of an ongoing call and cannot provide an end-to-end service handover for improving call quality between the terminal and the terminal.

In other words, even if the user of the calling terminal requesting the call requests the video call, the video call cannot be performed unless the receiving terminal is located in a wireless access network environment in which the calling terminal can make the video call.

Even if a receiver makes a handover to a wireless access network environment in which a receiving terminal can make a video call, a video call cannot be provided.

That is, despite the situation in which a better quality video call can be made between the terminals, the terminal cannot acquire information on the counterpart terminal, so it is inevitable to perform the initial connected voice call state.

In addition, when a call is made between a terminal located in a high bandwidth wireless access network and a terminal located in a low bandwidth wireless access network, the terminal located in a high bandwidth wireless access network wastes unnecessary resources.

Accordingly, there is a need for an apparatus capable of providing end-to-end service handover based on information of the counterpart terminal.

The present invention has been made to solve the problems of the prior art as described above, and an object of the present invention is to be able to perform end-to-end service handover by collecting the relevant information of the terminals connected to the call.

In addition, an object of the present invention is to prevent unnecessary resource waste of the terminal through the end-to-end service handover.

It is also an object of the present invention to provide a call quality for a call condition of a sender terminal user when a call condition of the sender terminal user occurs based on the related information of the terminals.

In order to achieve the above object and solve the problems of the prior art, the apparatus for service handover control of the present invention collects relevant information of a transmitting terminal and a receiving terminal operating on an IMS (IP Multimedia Subsystem), and collects the collected information. A service handover management unit for outputting a control signal for controlling service handovers of the transmitting terminal and the receiving terminal based on the information, and providing the service handover management unit with related information of the transmitting terminal and the receiving terminal; And a service handover control unit for controlling service handovers of the transmitting terminal and the receiving terminal on the basis of.

In this case, the service handover control unit provides the updated information to the service handover management unit when the related information of the transmitting terminal and the receiving terminal device is updated, and the service handover management unit is based on the updated information. A control signal for controlling service handover of the transmitting terminal and the receiving terminal may be output to the service handover controller.

In this case, the service handover management unit is an information collection unit for collecting the related information of the transmitting terminal and the receiving terminal, a service handover determination unit for determining whether a service handover occurs based on the collected related information and the service handover May occur, the service handover providing unit outputting a control signal for controlling service handovers of the transmitting terminal and the receiving terminal to the service handover control unit.

In this case, the related information of the transmitting terminal and the receiving terminal may be parameters related to a service profile and a network of each terminal.

In this case, the related information of the transmitting terminal may include call condition information with the receiving terminal.

In this case, the call condition information with the receiving terminal may be included in a Session Description Protocol (SDP) of an INVITE message transmitted from the transmitting terminal to the receiving terminal.

In this case, the call condition information with the receiving terminal may be a call media type, bandwidth, and charge.

The method for controlling a service handover of the present invention includes collecting related information of a transmitting terminal and a receiving terminal operating on an IMS basis, and controlling service handover of the transmitting terminal and the receiving terminal based on the collected information. And outputting a signal and controlling service handovers of the transmitting terminal and the receiving terminal based on the control signal.

The service handover control apparatus of the present invention is a service handover control apparatus for controlling service handover between the plurality of radio access networks of a terminal that can communicate using a plurality of radio access networks, the call information of the terminal, the And generating a control signal for controlling the service handover based on the first network information of the first radio access network to which the terminal is currently connected and the second network information of the second radio access network to which the terminal is to be connected. .

The service handover control method of the present invention is a service handover control method between radio access networks of a terminal that can communicate using a plurality of radio access networks, the call information of the terminal, the first radio access currently connected to the terminal Generating a control signal for controlling a service handover based on network information of a network and network information of a second radio access network to which the terminal will access; And controlling a service handover of the terminal based on the control signal.

The apparatus and method for controlling service handover of the present invention may collect end-to-end service handover by collecting related information of terminals connected to a call.

In addition, the present invention can prevent unnecessary resource waste of the terminal through the end-to-end service handover.

In addition, the present invention can provide a call quality for the call condition of the transmitting terminal user when a call condition of the transmitting terminal user occurs based on the related information of the terminals.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a system block diagram to which a service handover control apparatus according to an embodiment of the present invention is applied.

Here, devices configured in the system operate based on IMS.

Referring to FIG. 1, the system includes a transmitting terminal 110, a receiving terminal 150, a first service handover control unit 130, a second service handover control unit 140, and a service handover management unit 120. . In addition, the apparatus for service handover control includes a service handover management unit 120, a first service handover control unit 130, and a second service handover control unit 140.

The transmitting terminal 110 is a terminal for requesting a voice call or a video call.

In this case, the transmitting terminal may request a call through a first mobile communication network configured in the first radio access network, and may request a call through a second mobile communication network configured in the second radio access network.

In this case, the transmitting terminal may include call condition information of the transmitting terminal user in the call request message when transmitting an INVITE message to the receiving terminal.

In this case, the call condition information of the user of the transmitting terminal may be included in the Session Description Protocol (SDP) of the call request message, and the call condition information may be a call media type, a bandwidth (BW) and a rate.

In this case, an existing request message may be used to connect a priority call based on a service that can be provided by a transmitting and receiving end, and call condition information may be included in the last part (UPDATE message) of this procedure.

The receiving terminal 150 is a terminal receiving a request for a voice call or a video call.

In this case, the receiving terminal may receive a call through a third mobile communication network configured in the third radio access network, and receive a call through a fourth mobile communication network configured in the fourth radio access network.

The first service handover control unit 130 is a service handover control unit located in a core network (Core Network) on the transmitting terminal side. A service signal for controlling the service handover of the transmitting terminal and the receiving terminal is received from the over manager to control the service handover of the transmitting terminal.

In this case, the first service handover control unit 130 may receive the related information of the receiving terminal from the second service handover control unit and provide it to the service handover management unit.

In this case, the first service handover control unit 130 may receive a control signal for controlling the service handover of the receiving terminal from the service handover management unit and provide the control signal to the second service handover control unit.

In this case, when the related information of the transmitting terminal and the related information of the receiving terminal are updated, the first service handover controller 130 may provide the updated information to the service handover manager.

In this case, the related information of the transmitting terminal and the receiving terminal may be parameters related to a service profile and a network of each terminal.

The parameters related to the service profile and the network may be a wireless access network accessible from the terminal, a quality of service (QoS) of the wireless access network, a session profile of the terminal, fee information, an interface profile of the terminal, and a terminal user profile. .

In this case, when the network interface of the transmitting terminal is turned on to receive a registration request from the transmitting terminal, the first service handover control unit 130 may provide the requested interface profile to the service handover manager.

In this case, the first service handover controller 130 may extract call condition information from the call request message transmitted from the transmitting terminal, and provide the extracted information to the service handover manager.

The second service handover control unit 140 provides the related information of the receiving terminal to the first service handover control unit, and receives and receives a control signal for controlling the service handover of the receiving terminal from the first service handover control unit. Control service handover of the terminal.

In this case, when the related information of the receiving terminal is updated, the second service handover controller 140 may provide the updated information to the first service handover controller.

In this case, when the network interface of the receiving terminal is turned on and receives a registration request from the receiving terminal, the second service handover control unit 140 may provide the interface profile of the receiving terminal that is requested to be registered to the first service handover control unit.

Here, the first service handover control unit and the second service handover control unit are preferably S-CSCFs (Serving-Call Session Control Functions) based on IMS.

The service handover management unit 120 collects related information of the transmitting terminal and the receiving terminal provided from the first service handover control unit, and controls a service handover of the transmitting terminal and the receiving terminal based on the collected related information. It generates and provides to the first service handover control unit.

That is, the service handover management unit 120 controls to control the service handover of the transmitting terminal and the receiving terminal based on the network interface information, the BW information of the transmitting terminal and the receiving terminal, the charge information of the terminal, and the user terminal information on the transmitting terminal. A signal is generated and output to the first service handover controller.

For example, the service handover management unit 120 calculates a delay from the transmitting terminal to the receiving terminal using information on collected radio access networks of each terminal capable of connecting a call between the transmitting terminal and the receiving terminal. And, based on the calculated delay can generate a control signal for controlling the service handover of the transmitting terminal and the receiving terminal.

In this case, the service handover manager 120 may provide a control signal for controlling the service handover to the first service handover controller only when it is necessary to perform the service handover based on the related information of the transmitting terminal and the receiving terminal. .

In this case, the service handover management unit 120 may be configured in any one of a router provided in the central network, an application server for providing an application, and a terminal, but is preferably configured in the application server.

Although the service handover management unit is connected to the first service handover control unit in FIG. 1 and is configured to be located in the central network where the first service handover control unit is configured, the service handover management unit is only one embodiment. The control unit may be configured in the configured central network to be connected to the second service handover control unit.

In addition, the service handover manager may not be connected to only one of the first service handover controller and the second service handover controller, but may be connected to two service handover controllers.

In addition, a service handover management unit connected to each of the first service handover control unit and the second service handover control unit may be provided.

FIG. 2 is a detailed block diagram of an exemplary embodiment of the service handover managing unit illustrated in FIG. 1.

Referring to FIG. 2, the service handover managing unit includes an information collecting unit 210, a service handover determining unit 220, and a service handover providing unit 230.

The information collecting unit 210 collects related information of a transmitting terminal and a receiving terminal provided by the first service handover control unit 130.

In this case, the related information of the transmitting terminal may include call condition information of the transmitting terminal user.

In this case, the information collecting unit 210 may collect a service profile and a user fee of the transmitting terminal.

In this case, the information collecting unit 210 may collect network information of one or more radio access networks connected to the transmitting terminal and network information of one or more radio access networks connected to the receiving terminal.

That is, the information collecting unit may collect information on the terminal itself, such as whether the network interface is on or off, a service profile of the terminal user, and network information of a radio access network connected to the network interface provided in the terminal.

In this case, since there may be more than one radio access network connected to each of the transmitting terminal and the receiving terminal, a connection route between the transmitting terminal and the receiving terminal may vary. Therefore, the delay between the transmitting terminal and the receiving terminal may vary depending on the radio access network environment.

The service handover determination unit 220 determines whether a service handover occurs based on the related information of the transmitting terminal and the receiving terminal collected by the information collecting unit.

In this case, the service handover determination unit 220 may determine whether the service handover occurs based on call condition information of the transmitting terminal user or related information of the collected transmitting terminal and the receiving terminal.

In this case, the service handover determination unit 220 may determine whether the service handover occurs at a predetermined time period or determine whether the service handover occurs whenever the related information of the transmitting terminal and the receiving terminal is updated.

The service handover provider 230 outputs a control signal for controlling the service handover that occurs when the service handover occurs as a result of the determination of the service handover determiner to the first service handover controller 130.

A description will be given of the service handover control apparatus according to an embodiment of the present invention with reference to FIG.

3 is an exemplary view for explaining an operation of the apparatus for service handover control of the present invention.

Referring to FIG. 3, the operation of the service handover control apparatus will be described below.

Here, it is assumed that only the network interface IF1 of the transmitting terminal and the receiving terminal is on.

In addition, it is assumed that the BW of the radio access network connected to the network interface IF2 is higher than the BW of the radio access network connected to the IF1.

If the sending terminal user requests a call to the receiving terminal and the receiving terminal user approves, the call is connected.

Here, since both the transmitting terminal and the receiving terminal have the IF1 turned on, the call is connected through the IF1 of the transmitting terminal and the IF1 of the receiving terminal.

In this case, the call request message transmitted from the transmitting terminal to the receiving terminal includes call condition information of the transmitting terminal.

The first service handover control unit obtains relevant information of the transmitting terminal, such as a call request message, a network interface profile, and network information, and provides it to the service handover manager.

In this case, the related information of the transmitting terminal may include information about IF1, which is network interface information, BW of radio access networks connected to the network interface, a charge, a transmitting terminal user profile, and call condition information included in a call request message. .

The second service handover control unit obtains the related information of the receiving terminal through the call approval message, the network interface profile, and the network information, and provides it to the service handover manager through the first service handover control unit.

In this case, the network interface profile of the receiving terminal may be IF1 information.

Accordingly, the call is connected to the transmitting terminal and the receiving terminal through the network interface IF1.

When the call between the transmitting terminal and the receiving terminal is made of IF1 and the receiving terminal moves to a radio access network connected to the network interface IF2 and IF2 is turned on, information on the IF2 is registered to the second service handover controller.

The second service handover controller provides information on the IF2 of the receiving terminal to the service handover manager through the first service handover controller.

After the IF2 of the receiving terminal is registered, the transmitting terminal moves to the radio access network connected to the network interface IF2, and if IF2 is turned on, the information about the IF2 is registered as the first service handover controller.

The first service handover controller provides information on the IF2 of the transmitting terminal to the service handover manager.

Since the service handover management unit has both the IF2 of the transmitting terminal and the receiving terminal turned on, the service handover management can perform the service handover to the radio access network connected to the IF2 to provide a better quality call based on the user's requirements. The control signal is provided to the first service handover controller.

The first service handover control unit outputs a control signal for performing a service handover to the IF2 provided from the service handover management unit to the second service handover control unit, and transmits the service terminal to the IF2 through the control signal. Control the service handover of the transmitting terminal.

The second service handover control unit controls the service handover of the receiving terminal so that the receiving terminal performs a service handover to IF2 through a control signal provided from the first service handover control unit.

When the transmitting terminal and the receiving terminal service handover to IF2, a call is made through IF2.

Although only the service handover according to BW is illustrated in FIG. 3, the present invention is not limited thereto, and when a call service corresponding to call condition information included in a call request message during a call can be provided, Service handover may also be controlled.

For example, assuming that a call condition of a transmitting terminal user is to perform a video call when the rate per minute is lower than the price A and can provide a BW of at least 200 [Kbps], the transmitting terminal during the call between the transmitting terminal and the receiving terminal And network information of a wireless access network connected to each of the receiving terminals, and determines whether to perform a video call based on the updated information.

At this time, the network information of the radio access network may be the minimum and maximum BW of the radio access network connected to each terminal, the number of users using the band of the radio access network and the available BW.

Only the voice call is performed in the wireless access network connected to the sending terminal or the wireless access network connected to the receiving terminal, and only the voice call is performed. To control the service handover of the transmitting terminal and the receiving terminal to provide.

As described above, the apparatus for controlling a service handover of the present invention can control service handover of the terminal based on the related information of the transmitting terminal and the receiving terminal to which the call is made, to prevent unnecessary resource waste, and to service handover according to the call condition. By doing this, it is possible to provide better call quality.

4 is a flowchart illustrating a service handover control method according to an embodiment of the present invention.

Referring to FIG. 4, the method for controlling a service handover collects related information of a transmitting terminal and a receiving terminal on which a call is performed (S410).

In this case, the transmitting terminal and the receiving terminal may operate based on the IMS.

In this case, the related information of the transmitting terminal and the receiving terminal may be parameters related to a service profile and a network of each terminal.

In this case, the service profile and the parameters related to the network may be a wireless access network accessible from the terminal, a QoS of the wireless access network, a session profile of the terminal, fee information, an interface profile of the terminal, and a terminal user profile.

In this case, the related information of the transmitting terminal may include call condition information with the receiving terminal, and the call condition information may be included in the SDP of the call request message transmitted from the transmitting terminal to the receiving terminal.

In this case, the call condition information may be a call media type, a BW and a charge.

It is determined whether a service handover occurs based on the related information of the transmitting terminal and the receiving terminal (S420).

As a result of determining whether the service handover has occurred (S430), if the service handover does not occur, it is determined again whether or not the service handover has occurred based on the collected information of the transmitting terminal and the receiving terminal.

Of course, when the related information of the transmitting terminal and the receiving terminal is updated, it may be determined whether a service handover has occurred based on the updated related information.

As a result of determining whether the service handover occurs (S430), if a service handover occurs, a control signal for controlling the service handover is output (S440).

The service handover of the transmitting terminal and the receiving terminal is controlled based on the control signal (S450).

5 is another operation flowchart of a service handover control method according to an embodiment of the present invention.

Referring to FIG. 5, when a call is connected between a transmitting terminal and a receiving terminal (S510), relevant information of a transmitting terminal and a receiving terminal including a call condition is collected (S520).

In this case, the call condition information may be a media type type, a BW and a rate.

In this case, the call condition information may be collected from the call request message transmitted from the transmitting terminal to the receiving terminal.

It is determined whether the call condition is satisfied based on the related information of the transmitting terminal and the receiving terminal (S530).

As a result of the call condition satisfaction determination, if the call condition is not satisfied, it is determined whether the related information is updated (S540). If the related information is updated, the updated related information is collected and then the call condition is satisfied again.

As a result of the call condition satisfaction determination, when the call condition is satisfied, a control signal for controlling a service handover corresponding to the call condition is output (S550).

The service handover of the transmitting terminal and the receiving terminal is controlled based on the control signal to perform a call corresponding to the call condition of the transmitting terminal user (S560).

At this time, the call condition may be set by the transmitting terminal user.

6 is a block diagram of a system to which a service handover control apparatus according to an embodiment of the present invention is applied. Referring to FIG. 6, the system to which the service handover control apparatus is applied includes a transmitting terminal 610, a receiving terminal 620, a first service handover control unit 651, a second service handover control unit 652, and a service handover. The management unit 660 and a network information storage device are included.

Hereinafter, the structure of a service handover control apparatus according to the present invention will be described in detail with reference to FIG. 6.

The transmitting terminal 610 communicates with the receiving terminal 620 connected to the third mobile communication network 642 through the first mobile communication network 641. The transmitting terminal 610 and the first mobile communication network 641 constitute the first radio access network 631, and the transmitting terminal 610 and the second mobile communication network 642 constitute the second radio access network 632. do. The receiving terminal 620 and the second mobile communication network 643 constitute the third radio access network 633, and the receiving terminal 620 and the fourth mobile communication network 644 constitute the fourth radio access network 634. do.

The service handover control apparatus 680 for controlling handover between the transmitting terminal 610 and the receiving terminal 620 includes a service handover management unit 660 and a first service handover control unit 651. The first service handover control unit 651 controls the handover of the transmitting terminal 610, and the second service handover control unit 652 controls the handover of the receiving terminal 620.

According to an embodiment of the present invention, the first and third mobile communication networks 641 and 643 and the second and fourth mobile communication networks 642 and 644 may be different types of communication networks. For example, the first and third mobile communication networks 641 and 643 may be WCDMA based general circuit switching networks, and the second and fourth mobile communication networks 642 and 644 may be IP based. It may be a packet switching network.

The transmitting terminal 610 may access and communicate with the first and second mobile communication networks 641 and 642, and the receiving terminal 620 may communicate with access to the third and fourth mobile communication networks 643 and 644. have.

The first service handover control unit 651 that controls the first mobile communication network 641 to which the transmitting terminal 610 is currently connected, transmits call information of the transmitting terminal 610 and network information of the first radio access network 631. Collect and provide to the service handover management unit 660.

The second service handover control unit 652 that controls the third mobile communication network 643 that the receiving terminal 620 is currently connected to may receive call information of the receiving terminal 620 and network information of the third radio access network 633. Collected and provided to the service handover management unit 660.

When the location of the transmitting terminal 610 is changed or a service to be used is changed and handover is performed, the transmitting terminal 610 is connected to the currently connected first radio access network 631 to the second radio access network 632. Is handed over. The second radio access network 632 is a radio access network associated with the first radio access network 631, and may be, for example, one of a plurality of physically adjacent radio access networks, and the first radio access network 631. It may be another kind of radio access network that covers some or all of the coverage of.

The service handover management unit 660 may include call information of the transmitting terminal 610, call information of the receiving terminal 620, network information of the first radio access network 631, and network information of the second radio access network 632. Generates a control signal for controlling the handover of the transmitting terminal 610 based on. The first service handover control unit 651 controls the handover of the transmitting terminal 610 based on the control signal.

The service handover manager 660 controls the handover in consideration of the network information of the access network to which the terminal is currently connected, as well as the network information of the access network to which the terminal is connected as a result of the handover. The service handover manager 660 determines an optimal network for performing handover by further considering the network information of the plurality of second radio access networks 632 that the terminal can handover, and selects the optimal network. The terminal can be handed over.

According to an embodiment of the present invention, the network information of the second radio access network 632 may be provided by the network information storage device 670 in response to a request of the service handover manager 660. According to an embodiment of the present invention, the second radio access network 632 may not be directly connected to the first service handover control unit 651. Since the first service handover control unit 651 cannot collect network information of the second radio access network 632, the service handover management unit 660 generates a control signal for controlling handover of the terminal. The information of the 2 radio access network 632 may not be considered further.

According to an embodiment of the present invention, the second network information may include network operator information of a second access network that operates the second access network. The service handover manager 660 may generate a control signal for the terminal to handover to a radio access network operated by a specific network operator based on the network operator information.

According to an embodiment of the present invention, the second network information may include a list of currently available access networks by providing a service desired by the terminal among the access networks of the network operator of the second access network. The service handover manager 660 may determine whether a handover occurs for only a radio access network that provides a service desired by the terminal, based on the list of available access networks. In order to handover from the currently accessed radio access network to another radio access network, the terminal should measure the radio environment of the currently accessed radio access network and the radio environment of another radio access network to be handed over. According to an embodiment of the present invention, the service handover manager 660 may transmit the list of available access networks to the terminal. The terminal may measure only the radio environment of the radio access network, which provides a service desired by the terminal, not all accessible radio access networks. The terminal can save the battery consumption required to measure the wireless environment.

According to one embodiment of the invention, the second network information may comprise a list of specific base stations or wireless access points, belonging to the available access network. The specific base station may be a mobile Internet base station (RAS: Radio Access Station) constituting a portable Internet network, such as Wibro / Wimax, or may be a base station of a general cell-type second and third generation mobile telephone network. The terminal receives the information of the base station or the wireless access point to be handed over directly from the service handover management unit 660 without going through a complicated procedure of accessing the second network and receiving the list of the portable Internet base station or the wireless access point. Handover. The procedure performed by the terminal for handover is simplified, and the battery consumption of the terminal can be reduced.

According to an embodiment of the present invention, the network information storage device 670 may collect and manage network information of another radio access network located near a specific radio access network. According to an embodiment of the present invention, the network information storage device 670 may be a media independent information service (MIIS) server defined in IEEE802.21.

When the terminal hands over from the first radio access network 631 to the second radio access network 632, the second radio access network 632 until the terminal directly connects to the second radio access network 632. Since the network information may not be obtained, the service handover manager 660 may not perform an optimal handover.

Accordingly, according to an embodiment of the present invention, the service handover management unit 660 stores network information of the plurality of second radio access networks 632 associated with the first radio access network 631 to which the terminal belongs. Since it is possible to obtain from 670, even when the information of the second radio access network 632 is not obtained through the first service handover control unit 651, the optimal handover may be controlled.

According to an embodiment of the present invention, the service handover manager 660 may request network information of the second radio access network 632 from the network information storage device 670. The network information storage device may transmit network information of the second radio access network 632 to the service handover manager 660 in response to a request of the service handover manager 660. In consideration of network information of the second radio access network 632 received from the network information storage device 670, a control signal for controlling handover of the terminal may be generated.

According to an embodiment of the present invention, the call information of the terminal may include at least one of a service profile of the terminal, a call media type, a bandwidth of a service currently being used, and a usage fee.

According to an embodiment of the present invention, the network information of the first radio access network 631 or the network information of the second radio access network 632 may include the types of communication media provided by the network, the minimum guaranteed bandwidth according to each media type, and the network information. It may include at least one or more of the usage fee.

According to an embodiment of the present invention, the service handover management unit 660 selects at least one or more radio access networks providing a service that the terminal wants to use from among a plurality of second radio access networks, and selects the selected radio access. A list of networks can be created and sent to the terminal.

The terminal may measure the change in the radio channel only for the radio access network by referring to a list of only the radio access networks that provide a service that the terminal currently wants to use among the plurality of second radio access networks to which the terminal is accessible.

In order to handover from the currently accessed radio access network to another radio access network, the radio environment of the currently accessed radio access network and another radio access network is transmitted to the service handover manager 660. The service handover manager 660 controls the handover of the terminal based on the change of the radio channel of the radio access network transmitted by the terminal. Since the terminal does not measure the change in the radio channel of all the radio access networks to which the terminal is accessible, it changes only the radio channel of the radio access networks in the radio access network list providing the service desired by the terminal. It can reduce the power consumption required to measure. That is, among the plurality of radio access networks, the second radio access network to which the terminal is to be connected is determined from the radio access network list provided by the service handover manager 660.

7 is a flowchart illustrating a service handover control method according to an embodiment of the present invention. Hereinafter, a service handover control method according to the present invention will be described in detail with reference to FIG. 7.

In operation S710, call information of a terminal to be handed over and network information of the first radio access network 631 are collected.

In operation S720, the network information storage device 670 requests network information of the second radio access network 632.

In operation S730, network information of the plurality of second radio access networks associated with the first radio access network 631 may be received from the network information storage device 670.

In operation S740, it is determined whether a handover occurs in the terminal based on call information of the terminal, network information of the first radio access network 631, and network information of the second radio access network 632.

If a handover occurs, in step S750 a control signal for controlling a service handover is output.

In step S760, handover of the terminal is controlled.

8 is an exemplary view for explaining the operation of the service handover control apparatus according to an embodiment of the present invention. Hereinafter, the operation of the apparatus for controlling service handover according to the present invention will be described in detail with reference to FIG. 8.

In step S810, the receiving terminal accepts the call in response to the call request of the transmitting terminal, and as a result, the call is connected between the transmitting terminal and the receiving terminal.

In operation S820, the service handover manager 660 collects call information of the transmitting terminal, call information of the receiving terminal, and network information of the first radio access network 631.

In operation S830, the service handover manager 660 requests the network information storage device 670 for network information of the second radio access network 632. The network information storage device 670 transmits the network information of the second radio access network 632 to the service handover manager 660 in response to the request. The network information of the second radio access network 632 received by the service handover manager 660 is used to generate a control signal for performing an optimal handover.

In operation S840, an optimal handover is performed based on network information of the second radio access network 632 received by the service handover manager 660.

The service handover control method according to the present invention can be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal line, a wave guide, or the like, including a carrier wave for transmitting a signal designating a program command, a data structure, or the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

1 is a system block diagram to which a service handover control apparatus according to an embodiment of the present invention is applied.

FIG. 2 is a detailed block diagram of an exemplary embodiment of the service handover managing unit illustrated in FIG. 1.

3 is an exemplary view for explaining an operation of the apparatus for service handover control of the present invention.

4 is a flowchart illustrating a service handover control method according to an embodiment of the present invention.

5 is another operation flowchart of a service handover control method according to an embodiment of the present invention.

6 is a block diagram of a system to which a service handover control apparatus according to an embodiment of the present invention is applied.

7 is a flowchart illustrating a service handover control method according to an embodiment of the present invention.

8 is an exemplary view for explaining the operation of the service handover control apparatus according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

120: service handover management unit

130: first service handover control unit

140: second service handover control unit

210: information collector

220: service handover determination unit

230: service handover provider

Claims (34)

A service hand that collects relevant information of a transmitting terminal or a receiving terminal operating on an IMS (IP Multimedia Subsystem) and outputs a control signal for controlling a service handover of the transmitting terminal or the receiving terminal based on the collected information. Over management; And A service handover control unit for providing related information of the transmitting terminal and the receiving terminal to the service handover management unit and managing service handover of the transmitting terminal or the receiving terminal based on the control signal; Including, Related information of the transmitting terminal, At least one of a service profile of each of the terminals, parameters related to a radio access network, and call condition information with the receiving terminal; / RTI &gt; Related information of the receiving terminal, At least one of parameters related to a service profile and an access network of each of the terminals Service handover control device comprising a. The method of claim 1, The service handover control unit When the related information of the transmitting terminal and the receiving terminal is updated, provide the updated information to the service handover management unit, And the service handover management unit outputs the control signal to the service handover control unit based on the updated information. The method of claim 1, The service handover management unit An information collecting unit collecting related information of the transmitting terminal and the receiving terminal; A service handover determination unit determining whether a service handover occurs based on the collected related information; And A service handover provider for outputting the control signal to the service handover controller when the service handover occurs Service handover control device comprising a. delete delete The method of claim 1, Call condition information with the receiving terminal is And a Session Description Protocol (SDP) of a call request message transmitted from the transmitting terminal to the receiving terminal. The method of claim 1, Call condition information with the receiving terminal is And at least one of call media type, bandwidth, and charge. The method of claim 1, wherein the service handover management unit, And outputting the control signal in consideration of first network information of a first radio access network to which the transmitting terminal and the receiving terminal belong or second network information of a second radio access network associated with the first radio access network. Device for providing a service handover. The method of claim 8, wherein the second network information, Service handover providing apparatus, characterized in that received from a network information storage device in response to a request of the service handover management unit. The method of claim 8, wherein the first network information or the second network information is And at least one of a call media type, a minimum guaranteed bandwidth, and a charge for the first radio access network or the second radio access network. Collecting related information of a transmitting terminal or a receiving terminal operating on an IMS basis; Outputting a control signal for controlling a service handover of the transmitting terminal or the receiving terminal based on the collected information; And Managing service handover of the transmitting terminal or the receiving terminal based on the control signal; Including, Related information of the transmitting terminal is At least one of a service profile of each of the terminals, parameters related to a radio access network, and call condition information with the receiving terminal; / RTI &gt; Related information of the receiving terminal is At least one of parameters associated with a service profile and a radio access network of each terminal Service handover control method comprising a. 12. The method of claim 11, The service handover control method Outputting a control signal for controlling service handover of the transmitting terminal and the receiving terminal based on the updated information when the related information of the transmitting terminal or the receiving terminal is updated; The service handover control method further comprising. 12. The method of claim 11, The outputting of the control signal Determining whether a service handover occurs based on the collected related information; And Outputting a control signal for controlling service handover of the transmitting terminal and the receiving terminal when the service handover occurs; Service handover control method comprising a. delete delete 12. The method of claim 11, The call condition information is The service handover control method, characterized in that included in the SDP of the call request message transmitted from the transmitting terminal to the receiving terminal. 12. The method of claim 11, And the call condition information includes at least one of a call media type, a bandwidth, and a charge. The method of claim 11, wherein the outputting of the control signal comprises: Outputting a service handover control signal in consideration of first network information of a first radio access network to which the transmitting terminal and the receiving terminal belong or second network information of a second radio access network associated with the first radio access network; The service handover control method characterized in that. The method of claim 18, wherein the outputting the control signal, Requesting the second network information from a network information storage device; And Receiving the second network information from the network information storage device. Service handover control method comprising a. The method of claim 18, wherein the first network information or the second network information, And at least one of a call media type, a minimum guaranteed bandwidth, and a rate provided by the first radio access network or the second radio access network. A service handover control apparatus for controlling service handover between a plurality of radio access networks of a terminal that can communicate using a plurality of radio access networks, A control signal for controlling the service handover based on call information of the terminal, first network information of a first radio access network to which the terminal is currently connected, and second network information of a second radio access network to which the terminal is to be connected; Service handover control device, characterized in that for generating. The method of claim 21, wherein the call information is And at least one of a service profile, a call media type, a bandwidth, and a charge of the terminal. The method of claim 21, wherein the respective network information is And at least one of a call media type, a minimum guaranteed bandwidth, and a rate provided by each radio access network. The method of claim 21, wherein the second network information, And a network information received from a network information storage device in response to a request of the service handover management unit. The method of claim 24, wherein the network information, And at least one of network operator information of the second radio access network, a list of currently available access networks among the access networks of the network operator, and a list of specific base stations and wireless access points of the available access network. Service handover control device. The apparatus of claim 24, wherein the network information storage device is a media independent information service (MIIS) server defined in the IEEE 802.21 standard. 22. The method of claim 21, Among the plurality of radio access networks, service handover, characterized in that for transmitting the radio access network list providing the service desired by the terminal to the terminal, wherein the second radio access network is determined from the radio access network list. controller. 28. The method of claim 27, And wherein the second radio access network is determined in accordance with a change in radio channel for a radio access network in the list. A service handover control method between radio access networks of a terminal that can communicate using a plurality of radio access networks, Generate a control signal for controlling a service handover based on call information of the terminal, first network information of a first radio access network to which the terminal is currently connected, and second network information of a second radio access network to which the terminal is to be connected. Making; And Controlling a service handover of the terminal based on the control signal Service handover control method comprising a. The method of claim 29, wherein the call information And at least one of a service profile, a call media type, a bandwidth, and a charge of the terminal. The method of claim 29, wherein each of the network information, And at least one of a call media type, a minimum guaranteed bandwidth, and a rate provided by each radio access network. 30. The method of claim 29, Requesting the second network information; And Receiving the second network information More, Receiving the second network information, And receiving the second network information from a network information storage device. The method of claim 29, wherein the second network information, And at least one of network operator information of the second radio access network, a list of currently available access networks among the access networks of the network operator, and a list of specific base stations and wireless access points of the available access network. Service handover control method. 34. A method according to any one of claims 11 to 20 and 29 to 33. A computer-readable recording medium having recorded thereon a program for executing the program.

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